Upload
eap-inc-eap-inc
View
215
Download
0
Tags:
Embed Size (px)
DESCRIPTION
Price Noise Control Sales Bulletin
Citation preview
Noise Control Products
Product Features
Tested in the NVLAP Accredited Price Sound Lab
A competitive solution to
undesirable dust noise A vast range of product solutions
suitable for any HVAC application Developed to maximize insertion
loss while minimizing system pressure drops
Wide range of catalog performance
data and construction characteristics
Sales Bulletin
Sound is a common part of every day life, but when a sound is unwanted, it is considered noise. When noise in a room is at unacceptable levels, it can be an annoyance, distracting the occupants and in turn resulting in higher stress levels and decreased productivity. This is why noise control has become just as important to a good HVAC system design as air movement, temperature control, and humidity management.
Price Noise Control – Overview
Silencer Type and Application
Absorptive
Absorptive silencers, which are also known as dissipative silencers, utilize
sound absorbing media to attenuate sound levels. As the noise inside
the duct passes through the silencer, the acoustic energy enters the
baffles through holes in the internal perforated metal liner. This
perforated metal liner protects the acoustic media from being eroded by
the air at high velocities but has a large enough free area to be
considered acoustically transparent. Once inside the baffle the acoustic
energy interacts with the absorptive media, which typically consists of
strands of glass fiber. The friction between the acoustic energy and the
glass fibers converts the acoustic energy into heat, thereby reducing the
amount of acoustic energy which results in decreased sound levels at the
discharge of the silencer.
Film Lined Absorptive
Film lined absorptive silencers work on the same principle as the standard
absorptive silencers. However, these silencers have a thin film liner wrapped
around the acoustic media to protect the media from airborne contaminants
and high levels of moisture that may be present in the air stream of some
systems.
Packless
Packless silencers, sometimes referred to as reactive silencers, contain no
absorptive material and are constructed solely of solid and perforated sheet
metal. Attenuation of sound levels is achieved using multiple chambers of
varying design located behind a perforated metal liner.
EAP, Inc. 3930 Virginia Ave. Cincinnati. Ohio 45227 513.489.9494 Phone 513.489.6448 Fax
Price Noise Control – Products
Rectangular Silencers
.
Rectangular silencers are the standard for silencing noise transmitted through ductwork. Their simple design
and relative low cost make them the first choice for the highest sound attenuation and lowest pressure drop
on the air distribution system. They are available with a number of options that allow them to be integrated
into any HVAC system with ease. A wide range of designs with low to high pressure drop and a large selection
of media options can be applied to systems typically ranging from 0-2500 FPM
Elbow silencers have many of the same performance characteristics of rectangular silencers but are extremely
versatile and an excellent choice for systems where straight lengths of ductwork are not available. Elbow
silencers perform at or above the levels of rectangular silencers with a small increase in pressure drop on the
system, and can be configured to suit most duct sizes without the use of transitions.
Elbow Silencers
Absorptive Rectangular Silencers RL, RM, RH (Low, Medium and High
Velocity Designs)
Price Absorptive Rectangular Silencers
utilize perforated internal baffles composed
of acoustic grade fiberglass media for in
duct noise attenuation. They are available
in a wide range of materials, sizes and
configurations.
Absorptive Rectangular Film Lined Silencers RLT, RMT, RHT (Low, Medium and High Velocity
Designs)
Price Absorptive Rectangular Film Lined Silencers
utilize a thin layer of Tedlar film wrap around the
internal acoustic media to protect the media in
applications where high levels of moisture and
airborne contaminants are possible.
Absorptive Rectangular Extended Casing Silencers RLX, RMX, RHX (Low, Medium and High
Velocity Designs)
Price Absorptive Rectangular Extended
Casing Silencers are designed for
applications where higher insertion loss is
required at low frequencies, which is
accomplished by extending the thickness of
the internal baffles.
Absorptive Rectangular Film Lined Extended Casing
Silencers
RLTX, RMTX, RHTX (Low, Medium and High
Velocity Designs)
Designed for applications where higher insertion
loss is required in the lower frequencies and
additional protection against high levels of
airborne contaminants and moisture is needed. This
is accomplished by extending the thickness of the
internal baffles and wrapping the internal acoustic
media with a thin layer of Tedlar.
Absorptive Elbow Silencers ERM
Price Absorptive Elbow Silencers ae
designed to fit where short duct runs do
not allow for standard rectangular
silencers. They also provide the added
benefit of improved mid frequency
performance.
Absorptive Elbow Film Lined Silencers ERMT
Price Absorptive Elbow Film Lined Silencers are
designed to fit where short duct runs do not
allow for standard rectangular silencers and
provide additional protection of the acoustic
media with a Tedlar film liner. The acoustic
media is wrapped in a thin layer of Tedlar to
protect against high levels of moisture and
airborne particulate.
Absorptive Elbow Extended Casing Silencers
ERMX
Price Absorptive Elbow Extended Casing
Silencers are designed for applications
where higher insertion loss is required at
lower frequencies, which is accomplished
by increasing baffle thickness.
Absorptive Elbow Extended Casing Film Lined Silencers ERMTX Designed for short duct runs where higher
insertion loss is required in lower frequencies
and additional protection against higher
levels of airborne contaminants and moisture
is needed. This is accomplished by increasing
baffle thickness and wrapping the internal
acoustic media with a thin layer of Tedlar.
EAP, Inc. 3930 Virginia Ave. Cincinnati. Ohio 45227 513.489.9494 Phone 513.489.6448 Fax
Price Noise Control – Products
Circular Silencers
Packless Silencers
Circular silencers are an excellent solution when round ductwork is utilized in the system. They eliminate the
need for square to round transitions that cause undesirable pressure drops and system effects. Circular
silencers are available in a wide range of sizes, which allow for varying ranges of attenuation and pressure
drop.
Packless silencers, sometimes referred to as reactive silencers, contain no absorptive material and are constructed
solely of solid and perforated sheet metal. Attenuation of sound levels is achieved using multiple chambers of
varying design located behind a perforated metal liner. As sound passes through the silencer the acoustic energy
is dissipated in a manner similar to the Helmholtz resonator concept, which results in decreased sound levels at
the discharge of the silencer.
EAP, Inc. 3930 Virginia Ave. Cincinnati. Ohio 45227 513.489.9494 Phone 513.489.6448 Fax
Price Noise Control – Products
Specialty Silencers
A Standard silencer configuration can not always be adapted to work in every situation. In these cases
it is necessary to develop a unique silencer that meets the requirements of the special application.
Please Contact EAP, Inc. with any questions or inquires about Noise Control Products
Visit us at www.eapnet.com
Follow Us On Facebook &Twitter
EAP, Inc. 3930 Virginia Ave. Cincinnati. Ohio 45227 513.489.9494 Phone 513.489.6448 Fax